This program includes a couple of Perotin's major works, plus
some other forms of smaller scale. The scope is a nice feature.
A distinction can be made between the organum genre based
on plainchant and given a liturgical function, the genres of
conductus & rondellus based on original melodies
and functioning as clerical songs (although usually with theological
themes), and finally the motet based frequently on plainchant
but given a developing secular function. The latter
genre actually developed from the complex closing melismas of
the large-scale organum.

Other significant programs which highlight the conductus form
of this era: